[PATCH] D122175: [clang][extract-api] Enable processing of multiple headers

[Daniel Grumberg via Phabricator via cfe-commits]

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Before actually executing the ExtractAPIAction, clear the
CompilationInstance's input list and replace it with a single
synthesized file that just includes (or imports in ObjC) all the inputs.

Depends on D122141 <https://reviews.llvm.org/D122141>


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D122175

Files:
  clang/include/clang/SymbolGraph/FrontendActions.h
  clang/lib/SymbolGraph/ExtractAPIConsumer.cpp
  clang/test/SymbolGraph/global_record_multifile.c

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